US Bridges

SR821SB Onrmp 13.9 over Canal C-1-N

Fair

Miami-Dade County, Florida · 1.15 Miles North of US1 · Structure no. 870546

Built
1973
52 years old
Condition
Fair
inspected March 2024
Type
Slab
Prestressed Concrete
Length
121 ft
3 main spans
Daily traffic
14,501
2024 count
Owner
Toll Authority
State Toll Authority

About this bridge

SR821SB Onrmp 13.9 over Canal C-1-N is a prestressed concrete slab carrying SR821SB Onrmp 13.9 over Canal C-1-N in Miami-Dade County, Florida. It was built in 1973, so it is 52 years old, older than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 14,501 vehicles a day, projected to reach 32,500 by 2042. The structure is 121 ft (36.9 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR821SB Onrmp 13.9
CrossesCanal C-1-N
Location1.15 Miles North of US1
RouteState Highway 821
CountyMiami-Dade County
StateFlorida
Coordinates25.59686, -80.37482
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.7 US tons
Inventory rating60.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20 + Mod
Structure length121 ft (36.9 m)
Longest span44 ft (13.3 m)
Deck width40 ft (12.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,501 (2024)
Projected traffic32,500 by 2042
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR821SB Onrmp 13.9 over Canal C-1-N built?

It was built in 1973, making it 52 years old in 2025.

What condition is SR821SB Onrmp 13.9 over Canal C-1-N in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.

How much traffic does SR821SB Onrmp 13.9 over Canal C-1-N carry?

About 14,501 vehicles per day (2024 count).

How long is SR821SB Onrmp 13.9 over Canal C-1-N?

The structure is 121 ft (36.9 m) long with a longest span of 44 ft (13.3 m) and a deck 40 ft wide.

Who owns SR821SB Onrmp 13.9 over Canal C-1-N?

It is owned by the State Toll Authority.